LGE Internal Use Only
3. TROUBLE SHOOTING
3.4.2.4
Checking RF signal path
3.4 GSM RF PART
Circuit Diagram
Image
Checking Flow
TP1
TP2
TP3
TP3
Main
Bot
Main
Bot
U3101
TP1
TP2
Check TP1
Re-solder or Change
Check TP2
YES
YES
NO
NO
Check TP3
Re-solder or Change
YES
START
RF signal path is OK
Re-solder or Change
NO
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2017 LG Electronics. Inc. All right rese
rved. Only training and service purposes
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